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Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Securities in an Unrealized Loss Position for Less than 12 Months    
Total temporarily impaired securities Fair Value $ 56,465 $ 78,141
Total temporarily impaired securities Unrealized Losses 308 1,898
Securities in an Unrealized Loss Position for More than 12 Months    
Total temporarily impaired securities Fair Value 52,435 18,556
Total temporarily impaired securities Unrealized Losses 1,936 1,657
Total temporarily impaired securities Fair Value 108,900 96,697
Total temporarily impaired securities Unrealized Losses 2,244 3,555
US Government-sponsored enterprises securities [Member]
    
Securities in an Unrealized Loss Position for Less than 12 Months    
AFS Fair Value 9,541 12,212
AFS Unrealized Losses 4 219
Securities in an Unrealized Loss Position for More than 12 Months    
AFS Fair Value 5,923   
AFS Unrealized Losses 77   
Total temporarily impaired securities Fair Value 15,464 12,212
Total temporarily impaired securities Unrealized Losses 81 219
Mortgage-backed securities [Member]
    
Securities in an Unrealized Loss Position for Less than 12 Months    
AFS Fair Value 46,924 64,937
AFS Unrealized Losses 304 1,675
Securities in an Unrealized Loss Position for More than 12 Months    
AFS Fair Value 45,606 17,979
AFS Unrealized Losses 1,735 1,199
Total temporarily impaired securities Fair Value 92,530 82,916
Total temporarily impaired securities Unrealized Losses 2,039 2,874
Corporate bonds [Member]
    
Securities in an Unrealized Loss Position for Less than 12 Months    
AFS Fair Value      
AFS Unrealized Losses      
Securities in an Unrealized Loss Position for More than 12 Months    
AFS Fair Value 890 555
AFS Unrealized Losses 110 445
Total temporarily impaired securities Fair Value 890 555
Total temporarily impaired securities Unrealized Losses 110 445
Equities [Member]
    
Securities in an Unrealized Loss Position for Less than 12 Months    
AFS Fair Value      
AFS Unrealized Losses      
Securities in an Unrealized Loss Position for More than 12 Months    
AFS Fair Value 16 22
AFS Unrealized Losses 14 13
Total temporarily impaired securities Fair Value 16 22
Total temporarily impaired securities Unrealized Losses 14 13
States and local governments [Member]
    
Securities in an Unrealized Loss Position for Less than 12 Months    
AFS Fair Value    992
AFS Unrealized Losses    4
Securities in an Unrealized Loss Position for More than 12 Months    
AFS Fair Value      
AFS Unrealized Losses      
Total temporarily impaired securities Fair Value    992
Total temporarily impaired securities Unrealized Losses    $ 4